GB1261217A - Camera objective with continuously variable focal length - Google Patents
Camera objective with continuously variable focal lengthInfo
- Publication number
- GB1261217A GB1261217A GB01237/69A GB1123769A GB1261217A GB 1261217 A GB1261217 A GB 1261217A GB 01237/69 A GB01237/69 A GB 01237/69A GB 1123769 A GB1123769 A GB 1123769A GB 1261217 A GB1261217 A GB 1261217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- focal length
- continuously variable
- variable focal
- camera objective
- march
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
1,261,217. Zoom lenses. AGFA-GEVAERT A.G. March 3, 1969 [March 8, 1968], No. 11237/69. Heading G2J. A wide aperture zoom lens consists of ten elements arranged as shown in four lens groups the first I, third III and fourth IV of which refract positively, and the second II negatively, the second being movable to vary the focal length and the first being simultaneously moveable to maintain a constant image position. Optical data for the objective is given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1278132 | 1968-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1261217A true GB1261217A (en) | 1972-01-26 |
Family
ID=5662251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB01237/69A Expired GB1261217A (en) | 1968-03-08 | 1969-03-03 | Camera objective with continuously variable focal length |
Country Status (4)
Country | Link |
---|---|
US (1) | US3580662A (en) |
CH (1) | CH482206A (en) |
FR (1) | FR2003477A1 (en) |
GB (1) | GB1261217A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE29237E (en) * | 1970-04-17 | 1977-05-31 | Karl Vockenhuber | Zoom lens for super 8 film |
US3784283A (en) * | 1971-04-14 | 1974-01-08 | Vockenhuber Karl | Zoom lens for super-8 film |
CH580821A5 (en) * | 1974-06-13 | 1976-12-15 | Bertele Ludwig | |
US5671996A (en) * | 1994-12-30 | 1997-09-30 | Donnelly Corporation | Vehicle instrumentation/console lighting |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3044355A (en) * | 1961-05-25 | 1962-07-17 | Bell & Howell Co | Zoom lenses |
US3044356A (en) * | 1961-05-26 | 1962-07-17 | Bell & Howell Co | Zoom lens |
-
1969
- 1969-03-03 CH CH319469A patent/CH482206A/en not_active IP Right Cessation
- 1969-03-03 GB GB01237/69A patent/GB1261217A/en not_active Expired
- 1969-03-05 FR FR6906114A patent/FR2003477A1/fr not_active Withdrawn
- 1969-03-10 US US805762A patent/US3580662A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2003477A1 (en) | 1969-11-07 |
CH482206A (en) | 1969-11-30 |
US3580662A (en) | 1971-05-25 |
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